The New York City Health Department has alerted local doctors of an outbreak of deadly bacterial meningitis among HIV-infected gay men.

Officials said in the past month, at least one person has died and another was hospitalized in critical condition from the outbreak.

“Since August 2010, we’ve detected 12 cases of this very specific strain but what we’re most concerned about is that in the past four weeks there have been four cases and one of those cases has died,” Deputy Commissioner for Disease Control in the Department of Health and Mental Hygiene Dr. Jay Varma told 1010 WINS.

Of the 12 cases associated with the outbreak, four have died in the past two years, according to the health department.